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ATTORNEY Patented Dec. 23, 1924i.

JOSEPH M. MCGINNIS, F PHILADELPHIA, PENNSYLVANIA.

REMOVAL VALVE MECHANISM FOR UNDERGROUND LIQUID TES;

Application led. January 24, 1924. Serial No. 688,257.

To all'fwhom t may concern:

Be it known that I, JOSEPH M. MCGINNis, a citizen of the United States,and a resident of the city of Philadelphia, county of Philadelphia,State of Pennsylvania, have invented certain new and useful Improvementsin Removal Valve Mechanism for Underground Liquid Tanks, of which thefollowing is a specification.

The present invention relates to underground liquid storage tanks, suchfor example as gasoline or oil tanks from which the contents are pumpedto a point of use. Some of the objects of the invention are to providea. removable valve structure for underground liquid storage tanks; toprovide a valve structure yarranged to prevent short liquid measureduring the pumping operations; to provide valve-,means for storage tanksto prevent leakage and waste of the liquid; to provide means whereby thecheck valve of an underground storage tank is accessible tor repairs andreplacement without requiring excavation; to provide means accessiblefrom the ground level for making repairs to a. foot valve oit a. buried`storage tank; to provide means toreliminating the expense and loss oftime now' required tor gaining access to the valves of tanks locatedbelow the level of the ground; and to provide other improvements as willhereinafter appear.

ln the accompanying drawings, Fig. 1 represents a` sectional elevationof Ian underground liquid storage tank showing one form of removablecontrol valve embodying the present invention; Fig. 2 represents asection on line 2-2 of Fig. 1; Fig. 3 represents a section on line 3-3of Fig. 1; and Fig. t re rese-nts a section on line 4 4 of Fig. 1.

A eterring to the drawings, one form of the present invention is shownapplied to a storage tank 10, such as employed as a reser voir forgasoline, or any other liquid, and which is located in the ground 11,and generally as in the case of inflammable liquids onnle ten to twentyfeet below the ground eve For the purpose of removing the stored liquid,a discharge pipe 12 1s provided, having on its lower end a toot piece13, the fluid inlet 14 of which is in close proximity to the bottom ofthe tank 10 so as to insure an emptying of the tank if desired. Anysuitable check'valve may be employed to control the inlet 14, and in thepresent instance a common form is shown comprising a ground valve 15having guide win 16 fitting the interior of the pipe 12. Asxed `pin 17is arranged transversal ofthe pipe 12 to serve as a stop to limit t eopening movement of the valve 15 and prevent its displacement. The checkvalve 15 opens towards the discharge end of the pipe 12. The upper en'dof the discharge pipe 12 opens into a chamber 18 which has lateralcommunication with a conduit 19 leading to the suction end of the pump20 which is above the ground level. 'lhe chamber 18 is formed, in thepresent instance, by a T fitting 21.

ln order to support the discharge pipe 12 in a removable manner, atubular casing 22 is provided. having its lower end. threaded into orotherwise joined to an annular Harige 23 on the tank 10, while its upperend is threaded into or otherwise fastened to the bottom of the Tiitting 21. rllhis casing 22 encircles the discharge pipe12 and has itsupper end provided with a ring 24: forming a seat 25 ot spherical tormto receive a head 26 having a lace 27 seating in and complemental to theseat 25. The two meeting laces of the head 26 and the ring 2d orin aground joint to Iprevent leakage from the chamber 13 when the pump is inoperation. llt will be noted that the discharge pipe 12 is thussuspended from the ring 24, and its weight eectually maintains asealedjoint. Further, in case the casing 22 is not accurately set vertical,the ball-like suspension ot the pipe 12 yallows the latter to take avertical position and still maintain a leak proot' joint. A bail orhandle 30 is secured to the head 26 so that a suitable hook or grapplingtool can engage it to remove the pipe 12 for repairs.

rlhe upper end of the l litting 21 is connected to an extension pipe 31opening above the ground level and normally closed by a cover plate 32which is preferably threaded over the end thereof.

ln order to eliminate the production ot' a vacuum in this pipe 31 by theaction of the pump 2() and thus cause a variation in the measuredquantity or liquid being pumped, the lower end of the pipe 31 isprovided with an internal flange 33 which forms a seat for a closure 34.'lo maintain this closure 3l tight it may be connected as shown by arigid rod 35 to the cap 32 so that when the latter is screwed claim andcarried by said discharge 1. A tank construction lcomprising incombination an underground tank, a shaft having one end connected tosaid tank and its other endv accessible from the ground level, a branchpipe from said shaft connected to a pumping unit, a discharge pipe insaid shaft, a. control valve in said tank ipe, means for removablysupporting said dischar e` pipe from said shaft, a cover for said sha t,and means accessible by removing said cover for withdrawing saiddischarge pipe and said valve from said shaft.

2. A tank construction comprising in combination an underground tank, ashaft having one end connected to said tank and its other end accessiblefrom the ground level, a branch pipe from said shaft connected to apumping unit, a discharge pipe in said shaft, a control valve in saidtank and carriedby said discharge pipe, means for removably supportingsaid discharge pipe fromsaid shaft, a cover for said shaft,

'means for sealing the upper end of said shaft from communication withsaid branch pipe, and means Iaccessible by removing said cover forwithdrawing said discharge pipe and said valve from sald shaft.

3.-A tank construction comprising in combination an underground tank, ashaft having one end connected to said tank and its other end accessiblefrom the ground level, a branch pipe from said shaft connected to apumping unit, a discharge pipe in said shaft, a control valve in saidtank and carried by said discharge pipe, means for removably supportingsaid discharge pipe from said shaft, a cover for said shaft, meanscontrolled by said cover for sealing the upper end of said shaft fromcommunication with said branch pipe, and means accessible by removingsaid cover for withdrawing said discharge pipe and said valve from saidshaft.

4. A tank construction comprising in combination an underground tank, ashaft having one end connected to said tank and its other end accessiblefrom the ground level.- a branch pipe from said shaft connected to apumping unit, a discharge pipe in said shaft, a control valve in saidtank and carried by said discharge pipe, means for removably supportingsaid discharge pipe from said shaft, a cover for said shaft, means forpreventing errors in the measured quantity of liquid pumped, and

means accessible by removing said cover for withdrawing said dischargepipe and said valve from said shaft.

5. A tankl construction comprising in combination an underground tank, ashaft comprising a casing secured to said tank, a T fitting and anextension ali ned with said casing and extending above t e ground level,a discharge pi e in saidcasing, a con.` trol valve on said pipe andlocated in said tank, a branch pipe from said shaft leading to a pumpingunit, means for removably suspending vsaid discharge pipe from saidcasing, and means for gaining access to said extension to remove saiddischarge pipe.

6. A tank construction comprising in combination an underground tank, ashaft comprising a casing secured to said tank, a T fitting and anextension aligned with said casing and extending aiove the ground level,a discharge pipe in Said cas ing, a control valve on said pipe andlocated in said tank, a branch pipe from said shaft leading to a pumpingunit, means including a leak proof joint for removably suspending saiddischarge pipe from said casing, and means for gaining access to saidextension to remove said discharge pipe.

7. A tank construction comprising v in combination an underground tank,a shaft comprising a casing secured to said tank, a T fitting and anextension aligned with said casing and extending above the ground level.a discharge pipe in said casing. a control valve on said pipe andlocated in said tank, al branch pipe from said shaft leading to apumping unit, means including a ground spherical joint for suspendingsaid discharge pipe from said casing, a lifting means on said dischargepipe,

and located in said tank, a ybranch 4pipe leading to a pumping unit, aseat on the inner end of said extension, a closure arranged to engagesaid seat, a cover'for the upper end of said extension, and meansactuated by said cover for holding said closure to said seat.

Signed at Philadelphia, county of Philadelphia, State of Pennsylvania,this 11th day of January, 1924.

JOSEPH M.` McGINNIS.

